Github user zentol commented on the issue:
https://github.com/apache/flink/pull/2418
Looks like we could just pop the variables map into constructor and get the
key names for free, that's neat.
I wouldn't worry too much about disregarding the naming scheme; in contrast
to other reporters additional keys (as i understand it) don't make it more
difficult to work with a given metric.
What we could do is add a configuration option `exposeAllKeys` or something
that if set pops the map into the constructor, otherwise it uses the configured
naming scheme.
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